While a thorough process is in place to dispose of narcotics and controlled drugs, an expert testified there's no similar plan for other drugs.

Wettlaufer's crimes were never detected and only came to light when she confessed them to mental health workers and police.

The probe will examine the systemic factors that allowed Elizabeth Wettlaufer to inject more than a dozen patients with overdoses of insulin while working at long-term care homes and private residences in southwestern Ontario for nearly a decade.